I’m ready to graduate from the more typical cheap, hard-to-read USB meter I have and onto something better, like an RD UM25 or UM34. Now trying to decide between the two.
I may be missing something, but on balance, I can’t discern why the UM34 would be favorable over the UM25, given the small price difference.
Am I missing something? Are there testing scenarios that escape my mind for which the UM34 is suitable but the UM25 is not?
According to RD’s own comparison table, they both do, and the UM25 supports Huawei’s fast charge protocols in addition.
That would be a minor consideration anyway, since I don’t envision a device that utilizes yet another proprietary fast charging standard in my future. I’m fine with USB PD and hope that’s where it will be centered. QC has enough critical mass to continue, and QC4 will have PD compatibility, which will help.
On paper, the 25 is superior in almost every regard, except that it has a USB 2 and not USB 3 port, but I’m not sure how relevant that is when these meters are only taking power measurements.
The sales material associated with the early reviews of the UM25 did not indicate that support like the current table does, so I guess it was added to the UM25 in an update at some point.
Do you have the C version? I figure it’s better to have it, than regret not getting it, but the mention of ads in the smartphone app would be a bummer.
It seems like the data lines are not receiving any signal. It shows 0V - & + and default 1.5A DCP. The YZX meter detects the load and is forcing the charger to put out a different charging protocol and it starts to charge. There is voltage reading at the end of the cable so I guess the issue is at the phone’s side.
It could be many reasons this happens and without knowing which phone, charger and cable you’re using there’s no way to troubleshoot. Have you tried to manually trigger PD or QC 5V? In theory that should work.
Most UT25 has been removed from Aliexpress, we should support originals instead of copies , otherwise it will cause loss to the original creator and they may never create new products
That bare board has great specs, but I find it hard to believe it would be able to handle 60W of output at lower range of input voltage for long times, say 12V which is 5A+ constant input, chargers usually get quite hot at that rate.
Looks quite great, thanks! However, the size and price is a bit overkill. For such multiport usage, the MagicFox PD180 京东(JD.COM)-正品低价、品质保障、配送及时、轻松购物! is cheaper and has higher wattage.
YZXstudio has a newer model ZC918P that does 160W. I bought one off ebay, but it’s also available aliexpress. Like other YZXstudio products, it’s good quality but quite expensive.
The Magic Fox PD180 looks very interesting. I think it is unique in offering PD input. Is it available anywhere more accessible than jd.com?